Single-payer: Peter S. Arno, senior fellow and director of health policy studies at the Political Economy Research Institute, University of Massachusetts, Amherst, will speak on single-payer health coverage for the state and how to pay for universal coverage. The event will be at 1333 Pine St. in Martinez from 3-5 p.m.

President Trump addresses nation after mass shooting at Florida SchoolWhite House

Haiti: A screening of a new documentary “Serenade for Haiti” will be held at 7 p.m. at the Roxie Theater with a question and answer session following. The screening will benefit Engineers Without Borders working in Haiti. http://bit.ly/2hSWieo

Democracy, explained: Learn how to run a campaign and get appointed to a commission from the Lamorinda Democratic Club, from 7-9 p.m. The event will be held from 7 to 9 p.m. at the Lafayette Library and Learning Center, featuring elected officials, campaign managers and consultants. http://bit.ly/2hGwXnJ

Limits of Whiteness: Neda Maghbouleh, assistant professor of sociology at University of Toronto, will lecture on how Iranian Americans move across a white not-white color line, discussing race in North America today. The lecture runs from 12:30 to 1:30 p.m at the Humanities Auditorium at the San Francisco State University. http://bit.ly/2fHvtFF

Black Panther history: Joshua Bloom and Waldo E. Martin Jr., authors of “Black Against Empire: The History and Politics of the Black Panther Party,” discuss their book at the San Francisco Main Library’s Koret Auditorium. 1 p.m. Oct. 29. Information about this event and others noting the book’s selection in the One City One Book program: http://bit.ly/2eTr1mz